34 CFR §648.63

1. (a)The institutional matching contribution may be used to—
   1. (1)Provide additional fellowships to graduate students who are not already receiving fellowships under this part and who satisfy the requirements of § 648.40;
   2. (2)Pay for tuition, fees, and the costs listed in § 648.62(b);
   3. (3)Pay for costs of providing a fellow's instruction that are not included in the tuition or fees paid to the institution in which the fellow is enrolled; and
   4. (4)Supplement the stipend received by a fellow under § 648.51 in an amount not to exceed a fellow's financial need.
2. (b)An institution may not use its institutional matching contribution to fund fellowships that were funded by the institution prior to the award of the grant.